How to use keepMounted with WindowVirtualizer?

[hungnb31]

I can see keepMounted only available with Virtualizer and VList, but not WindowVirtualizer. Any idea to add it to WindowVirtualizer or do we have the other way in WindowVirtualizer to achieve the same thing?

[inokawa]

WindowVirtualizer doesn't have keepMounted prop just because it wasn't requested until now. I think it's ok to implement it to WindowVirtualizer (PR welcome).